PHYS1008 - Lab

PHYS1008 - Lab

﻿Carleton University

Laboratory Report

Course #: PHYS1008 Experiment #: 2

Experiment Title

Christina Arruda
101001656

Date Performed: January 25th, 2016
Date Submitted: February 1, 2016
Lab Period: L7 - Monday AM
Partner: Amanda Van Geel
Station #: 16
TA: Ming

Purpose
The purpose of the lab is to use a oscilloscope to measure simple signal waveforms and understand the controls of the machine itself.
Theory
In part 3, the quality factor of the DC circuit at a given frequency can be calculated as followed:

Eq.1
Such that is the DC voltage and is the voltage from the highest to smallest peak of the wave.
The error of the quality factor can be calculated as followed:
Eq.2
Such that is the error of the ripple and is the error of the DC voltage.
Efficiency (𝜂) can be calculated as followed:
Eq. 3
Such that represents the function generator resistance (50Ω) and is the load resistance.

Apparatus
The main machine used is an oscilloscope which measures the voltage/potential difference as a function of time. It will used to calculate the frequency from a generator in part 1 and 2. In part 2, a DMM will be used to simultaneously as an external voltmeter.
In part 3, the oscilloscope will calculate the voltage conducted by a diode in circuit in order to convert AC to DC.

Figure 1: AC/DC Conversion Circuit for Part 3

Observations
For part 1, a frequency calibration was done with the oscilloscope and frequency generator. The frequencies ranged from 0 to 106 Hz. The frequency of the generator and oscilloscope was tabulated and plotted on the graph labelled “Figure 2: The Frequency Relationship between the Oscilloscope and Generator”.
For part 2, six various output levels were set on the generator and was measured by the DMM and oscilloscope. The measurements were then compare...